1. Actually that's debateable

Purely from a biblical point of view we have to answer the following questions:

What good would his birthright have been to Esau had he starved to death?

What kind of brother would make his elder's inheritance the price for NOT letting him starve to death; what does that say about Jacob's morality?

Taking the long view, what would have happened to the Jews had Esau been the patriarch rather than Jacob? Where then the twelve tribes and especially the all-important Benjaminites (David, and so Jesus, were both of this tribe)?

The last especially makes an easy biblical argument against your case. From a case of temporarily-constrained bargain selling and from the predatory response to it by a relative plutocrat, there eventually sprang the chosen people's greatest hero and the Savior of mankind.

2. Well, on that topic (bad act that results in "good" outcome)

You've put your finger on one of the things I hate most about religion: That gawd's ways are above ours and if he says "kill your son" -- or whatever -- you should just run out and do it; that's the righteous thing!